Machine for paraffining carton-blanks6.



M. L. TW'OMLEY.

MAGHINE FOB PARAFFINING CARTON BLANKS.

APPLICATION FILED B'BPT. 6, 1910.

1,@%;%% Patented ov; 26, m2.

4 SHEETS-SHEET 1.

M. L. TWOMLEY.

MACHINE FOR PARAFFINING CARTON BLANKS.

APPLICATION FILED SEPT. 6, 1910.

1,%5,Q22. Patented Nov. 26; 1912.

4 SHEETS-SHEET 2.

M. L. TWOMLEY. MACHINE FOR PARAFFINING CARTON BLANKS.

APPLICATION FILED SEPT. 6, 1910.

LQQfiggg Patented Nov. 26, 1912.

4 SHEETS-SHEET 3.

WZQEQF j/ZZ/fifZfO? km M 15 m m; 49%; W

144W? y I 7%5 M. L. TWOMLEY. MACHINE FOB. PARAPIINING CARTON BLANKS.

APPLICATION FILED SEPT. 6, 1910.

L%5,%Q2, Patented Nov. 26, 11912.

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made with paraflin. After the paraflin has @M M T ra'rnnro r ch.

MELVEAN'. L. TWOIVILEY, or annnsson, INDIANA.

'Anderson, in the county of Madison and State of Indiana, have invented certain new and useful Improvements in Machines for Paraihning Carton-Blanks, of which the following is a specification.

My invention relates to the art of coating blanks from whichcartons are to be been applied and the blanks are cut to shape they are creased and bent up' to shape, the

meeting edges of the blank overlapped and glued together. Heretofore the parafiining has been done by a pair of rollers, the one which applies the paraffin being grooved circumferentially at suitable distances along its length to leave untreated strips on the blank where the glue. is to be applied.

- Usually the lowenroll' dips into a bath of paraflin and applies it to the cardboard which is passed in the form of sheets between the rolls and subsequently 'cut up to form carton blanks which are then bent up and glued, as above stated. One edgeiof each sheetis made to extend over the groove in the applying roll, whereby it is left free of paraffin so that it may readily take the glue which is subsequently applied. It has been found, however, in practice notonly diflicult to feed such strips with sufficient accuracy so that no parafiin is spread upon the edge strip which is intended to be reserved for glue, but also very difficult to properly regulate the flow of such an amount of wax as is required to treat large sheets and when sheets are treated by the above method and then stacked there is a tendency for the wax to off-set from one sheet to the other, thereby applying some Wax to the edge which should be reserved for glue, and further, when the sheetsare parafiined by the above. method, the entire sheet being treated with the exception of the edges reserved for glue, it is found that thereafter when the sheets are being cut in cartons much difiiculty is encountered by reason of the wax adhering to the cutting die and filling the creases which produce the scores in the carton. It also follows that by the above method not only the carton -is parafiined but also the waste paper which must be stripped away from the carton, the parafiin applied to the waste paper being lost. The waste paper is sold to the Specification of Letters Patent. Application filed September 6,1910. serial No.

- MACHINE FOR ranarrmme cARTon-sLAnKs.

Patented Nov. as, are. 580,673.

paper mills and the wax on this paper is pap-er thus treated therefore, that this machine is efiicient only for pa'raflining sheets which contain cartons of the exact size for which the rolls are grooved. i

In the machine which forms the subject matter of my present invention the card board is not parafiined in the strip or sheet but this operation is performed after the sheet has been out up into carton blanks. I have found my machine to apply the paraflin with greater accuracy than was possible with the machines heretofore used and by the provision of the features which will be pointed out in the detailed description and covered in the claims an even coating of the desired thickness is obtained withoutdistributing the wax on the portion of the carton blank reserved for glue, and furthermore it is possible to operate upon a great deal more material in the same space of time than in the old machines and with less attention on the part of the operator employed in running the machine.

In my machine its highest efficiency is maintains-din making cartons of any size and as the cartons are paratfinod after being out there is no paraflined waste paper and in-the operation of cutting there is eliminated the problem encountered when cut-ting sheets that have previously been I In the drawings accompanying this specification, Figure 1 is a plan View of my machine; Fig. 2 a side elevation; Fig. 3 a vertical section on the line 33 of Fig. 1; Fig. 4: a vertical section on the line 44 of Fig. 3 looking in the direction of the arrows; Fig. 5 a vertical section on the line 55 of Fig. 3 looking in the direction of the arrows; Figs. 6 and 7 fragmentary views in elevation and horizontal section respectively of a doctor forming a partof my machine, apart being shown 1n section in Fig. 6; and Fig. 8 represents a carton blank showing the area to which paraflin is applied and that left free of wax for the subsequent application of glue.

the machine is in part in duplicate for the purpose of feeding two series of blanks at the same time through the rolls, but it Wlll be evident that a single series cani be fed at a time without altering the machine or ifdesired, by an obvious mechanical adjustment of the machine, it may be adapted for but a single series.

The frame 9 is provided with standards 10 for supporting the same and these parts may-be of any suitable design. The cardboard is fed between an upper-and a lower rollv 11, 12, the latter of which dips into a bath 13 of paraffin which is kept in a sultable state of fluidity by a steam jacket 14 beneath the pan. A'pipe 15 with a "alve 16 is shown for draining the tank. The rolls 11, 12 are also heated by steam with which the pipes 17, 18, located in the interior of the rolls, are supplied. These steam pipes are located in the lower part ofthe rolls and are bent upwardly and then outwardly, extending through hollow journals 19, 20, respectively, of. the upper and lower rolls and are connected to a common supply pipe 21. The lower roll is stationarily mounted in its bearings 22, 23, but the upper roll is mounted "in sliding. bearings 24, .25-

and is pressed into contact with the lower roll by springs 26, 27 which are adjustable by hand wheels 28, 29 in the usual manner for regulating the pressure between the rolls. In order to permit of the relative adjustment of the rolls a telescoping joint may be made in the pipes connecting the steam supply to the heating pipes of the rolls, as at 32, see Fig. 5. A supply tank 33 is mounted above the tank 13 which supplies paratlin to the lower roll and communication between the two is effected by a pipe 34 controlled by a hand valve 35. The paraflin in the supply tank is maintained in a fluid condition by steam pipes 36 located near the lower corners on opposite sides of the tank. Guides 37, 38, supported from the ends 39, 40 of the frame support the blanks as they are discharged from the rolls and deliver them to a receiving table to be described. In order to regulate the thickness of the wax layer applied to the carton by roll 12 it is supplied with adoctor 41 which is adjustable through screw rods 42, 43, at opposite ends thereof. These screw rods are threaded at their ends into tapped sleeves 42 which are pivoted to-the ears. 44 attached to the back of the doctor. The latter is pivoted,-

as at 45, and provided with a face or lining plate 46 which may be, and preferably is, of a different material from the body of the doctor, such as brass, and formed with a longitudinal rib 47, the edge of which is adjusted to scrape off superfluous wax from the roll 12. In order to insure an even thickness of wax throughout the length of the roll it is necessary to accurately adjust the liner at variouspoints along its length. For this purpose Iprovide screws in pairs at suitable intervals in the length of the doctor, one of each pair engaging a tapped bore in the body of the doctor and bearing upon the surface of the lining to press it away from the doctor and the other passing freely throu h the body of the doctor tapped into e lining and adapted to draw the lining toward the body of the doctor in a manner which will'be obvious. These screws, numbered 48 and 49, respectively, and the swivel head 50, are best shown in Figs. 6 and 7, the swivel head in theformer figure being" shown in dotted-lines.

As each carton blank passes between the rolls a certain proportion of the'wax on the lower roll is prevented from passing between the carton and the lower roll and banks up at the entry to the bite of the rolls. When the carton passes out of the rolls, relieving the passage between them, this wax is frequently transferred to the upper roll and. unless provision were taken for its removal it would form irregular masses 1 thereon and be applied to the upper faceof the succeeding blanks. In order to prevent this I have provided a scraper blade 51 which bears upon the upper roll and is attached to the upper edge of a pivoted trough 52 to receive the scrapings from the roll. The trough is swiveled at its ends upon the pipe sections 52, 52 extending through the sides of the frame, the former of which opens into the trough and is connected to piping 53, 54 leading to a point above the bath or tank 13. This system of piping serves to return the fluid wax from the trough to the bath 13. The steam pipe section 52 extends substantially the length of the trough and at one end is reduced to a small steam heating pipe which extends through the. pipes 53 and 54 to heat them and retain the wax in the trough and in the return pipe in fluid condition. The trough is provided at its ends with upwardly-extending arms 55 connected by springs 56 to the roll housings 57 to hold the scraper in close contact with the upper roll. The carton blanks are fed to the rolls by two series of endless belts or aprons 58, 59, both driven from the same roll ()0 at the feed end of the machine. The belts of the first series pass around a roll 61 located as closely as is Loaamaa its practicable 'to the bite of the treating rolls tom of a hopper "or to speak more accu-' rately in relation to the present machine of a pairof hoppers, .the side walls of which are formed by the a'djustable'partitions 63. These side walls are supported on fhollow posts 65 which are adjustable crosswise of the machine upon slotted bars 68,69. The

standards 65 are" formed at their lower ends with enlargements. 67 which engage the up per faces of slottedflbars 68, 69, and with screws 64 which pass through the slots. .70 and engage nuts 66, beneath them. It will be clear that by means of the said screws the sides of the hoppers can be accurately fixed upon the cross bars, theirpositions being determined by the width of the carton blank and with reference to the ends of'the rolls.

When adjusted for use the outside walls of the hoppers occupy vertical planes slightly beyond the ends of the rolls' so that the carton blanks in passing through the rolls project a sufficient distance beyond the ends thereofto leave the unwaxed strip above referred to, for glue. The forward end of each hopper is open but the rear end is formed of pairs of angular abutments 71,

the faces of which slopeinwardly towardthe bite of thefreating rolls and terminate short of the endless belts. The lower-ends of the abutments are in effect continued by adjustable members72 whose distance from the belts may be accurately fixed. The adjustable members are slotted as at 73 to receive studs 74 mounted on brackets 75, at-

tached to the cross-piece 76 by suitable bolts. The vertical posit-ion of the adjustable members is determined by thumb-screws 77 passing through anangular portion thereof and bearing upon the stationary brackets 7 5. The roll for driving the belts which form the bottoms of the hoppers is mounted at its ends in suitable bearings 78 and one of its trunnions projects outwardly beyond the side of the frame and carries a driving pulley 79. The treating rolls are provided on their corresponding ends with intermeshing gear wheels 80, 81, and the lower roll ,wit-h a belt pulley 82 which drives a belt 83 ex- 'tending over the pulley 7 9 and hence the aprons of the blank-feeding device. An idler 84 is mounted on a lever 85 for taking up slack in the belt. The gears on'the ends of the treating rolls are driven through the lower gear 81 by means of a gear 86 mounted on the power shaft 87 which carries a suitable fast and loose pulley 88 for transmitting power thereto.

The receivingtable consists of an endless apron 89 mounted on rollers 90, 91, supported in brackets 92, 93, which are adjustable along horizontal rods or tubes 94. Standards 95 support the outer ends of these horizontal rods or tubes, the

inner ends of which are'attached to brackets 96 on the framework. The upper run of the belt of-the receiving table is supportedon a plate 9.7 which rests on the upper ends of standards 98, also adjustable longitudinally of the rods or supports 94. The'endless belt 89 is driven from the power shaft through the twisted belt 98, reducing pu leys 99, 100, belt 101 and pulley 102 on the journal of the roll 90.

I have found in practice that as the following edge of the blank leaves the bite of the rolls it is apt to splash parafin in the direction of the feed belts or aprons. The latter are composed of rubber and it is desirable to preserve as much as possible their frictional surface which would be materially interfered with byv a coating of paraflin.- In order to obviate the coating of these belts I interpose between their rear ends and the treatlng rolls a screen which is preferably in the form of a pipe 103 of. considerable diameter extending. across the machine; With this pipe is connected a smaller steam pipe 104 which is fed by a pipe 105 from any suitable source of steam. It follows from this construction that. any drops of melted paraffin which are thrown back by the carton blank or treating rolls and arecaught by this pipe, their fluidity being maintained by; the heat thereof, are sooner or later dropped into the vat 13. While the pipe 103 catches any drops of considerable size finer particles may find their way beyond it belts is sufficient for this purpose even greater quantity of material than any machine heretofore employed and is more accu rate in "preserving the line between the coated area and the strip reserved for glue, and furthermore it requires less attention than any machine for the same purpose with which I am acquainted.

What I claim is: 1. In a machine of the class described, the combination of a pair of treating rolls, a

hopper for feeding blanks thereto, the

bottom of which is composed of two series of endless belts, one of which series passes about a roll located close to the bite of the rolls, the other of which series of belts passes about a roll located at a distance from the treating rolls, and means for driving both series of belts.

2. In a machine for applying paraflin to cartons, the combination of a pairtof treats ing rolls, endless belts for feeding carton blanks thereto, and a screen extending substantially the length of the rolls interposed point of travel of the belts, and a steam-pipe connected with said pipe for heating it.

. 5. In a machine of the-class described, a pair of rolls for applying wax to cartons, a scraper for removing wax from one of the rolls, and means for heating the scraper.

1 6. In a machine of the class described, the combination of a pair of rolls for applying paraflin to a carton, a scraper for removing wax from one of the rolls, and means for heating the scraper.

. 7 In a machine of the class described, the combination of a pair of rolls for applying wax to cartons, a scraper for removing wax from one of the rolls, a receptacle or conduit for receiving the wax removed from the scraper, and means for heating the scraper and conduit.

8. In a machine of the class described, the combination of a pair of rolls for applying parafiin to cartons, a tank for supplying paraffin to one of the rolls, a scraper, a conduit or receptacle for receiving wax from the scraper, means for heating the conduit,

andconnections for returning the molten wax to the parafiin tank. a

9. In a machine of the class described, the combination of a pair of rolls for applying. wax to carton blanks, endless belts for feed-- ing the same, and a guide arranged later- -'ally beyond the ends of the rollsto feed the blanks with their edges extending beyond the ends of the rolls.

10. In a machine of theKclass-described, the combination of a pair of rolls for applying paraflinto cartons, a tank for supplying paraflin to one of the rolls, a scraper, a conduit for receiving the wax from the scraper, pipe connections from the conduit for returning the molten wax to the paraflin tank, and a steam pipe in the conduit and pipe connections for heating the same. 11. In a machine of the class described, the combination of a pair of rolls, means for supplying one of the rolls with coating material, a hopper for receiving sheets of material to be coated, the bottom of which is. formed of endless belts, some of which belts extend around a roller arranged parallel to and in proximity to the coating rolls and others of which pass around a roll more remote therefrom, and a screen interposed between the .bite of the coating rolls and the belts.

12. In a machine of the class described, a

. coating roll, a pivoted doctor for controlling ,the thickness of coating material thereon,

screws connected to the doctor for adjusting it toward and away from the roll, a face plate 46 upon the doctor having a ridge -17. for scraping off superfluous wax, a series of screws bearing upon the face plate, and a second series of screws threaded into the face plate, the two series cooperating to adjust the face plate with reference to the body of the doctor.

13. In a-machine of the class described, the combination of a pair of rolls comprising a toproll and a paraffin-applying roll,

a tank beneath the latter in which it'dips, a doctor for controlling the thickness of material on the roll and a. face plate on the doctor adjustable toward and from the body thereof and-formed with a longitudinally extending rib.

MELVAN L. TWOMLEY. Witnesses;

LEWIS E. KIMBERLIN, EDITH M. HUDSON. 

